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N 497 913 Patented May 23, 1893.

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UNITED STATES PATENT OFFICE.

GEORGE E. DRAPER, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO CHARLES W. HAVES, OF SAME PLACE.

RAILWAY-SWITCH.

SPECIFICATION forming part 0f Letters Patent No. 497,913, dated May 23, 1893.

Application `filed December 12, 1892 Serial No. 454,931. (No model.)

To all whom t may con/cern:

Be it known that I, GEORGE E. DRAPER, of Boston, in the count-y of Suitolk and State of Massachusetts, have invented Vcertain new and useful Improvements in Street-Railway Switches, of which the following, taken in connection with the accompanying drawings, is a specification.

Myinvention relates to a method of connectlng the tongue of a street railway switch to the base piece. Heretofore the tongue has been connected to the base piece by a pivotbolt, fastened upon the under side in such a manner that the tongue, when worn orinjured so as to become unserviceable, could not be taken out, except by taking up the entire switch.

The object of my invention is to so construct the pivot bolt that it can be readily removed, and the tongue taken up or replaced without disturbing the switch base. This ob- ,iect I attain by means ofthe mechanism shown 1n the accompanying drawings, in which- Figure lis a plan of a switch having my improved pivot-bolt. Fig. 2 is a vertical section taken on line :1J-x of Fig. 1. Fig. 3 is a View from the under side, showing the lower end of the pivot-bolt, and the recess made in the under side of the base piece for its reception. Fig. 4 is a perspective view, showing the pivot-bolt.

I have represented the base or body of the switch by A in the drawings, and the tongue by T. The base and tongue may be made in any required style and dimensions; my invention relates to the pivot-bolt only.

The pivot-bolt D, H, is shown in full in Fig. 4. The upper part consists of a cylindrical part which forms the body, and a flange part cl. For convenience in turning it, a square hole is made at C. The lower part consists of the cross-headed screw I-I, the head I-I being formed as shown, and adapted to tit into the recess R (see Figs. 2 and 3). made in the under side of the base piece, and is circular, except that it has inwardly projecting buttresses K, K, against which the ends of the head of the screw H rest, and thus prevent it from turning around. The hole through the base A is made in the form shown at R', Fig. 3, so that when the cross-head of the screw H is turned in the right direction, it will pass through the base of the switch, and thus admit of the removing of the bolt and also of the tongue, but when the head is turned crosswise of the opening R', then it is held, and cannot be rotated, as it is checked by the buttresses K, K.

To remove a tongue, the user may turn the bolt backward, thus loosening the screw I-I, when it will turn until its position corresponds with that of the opening R; then the entire pivot-bolt may be drawn out, thus freeing the tongue, which may be repaired and replaced, or a new tongue may be substituted for it. If for any reason the pivot-bolt is injured or worn, it may be replaced without taking up the base of the switch, or in case it becomes loose, it can readily be tightened or adjusted.

I claim- In a switch, the combination of the switch tongue T and the detachable boltD: with the This recess is cross headed screw H H adapted to fit there- 

